HC_XTA_Fog       1182 drivers/gpu/drm/via/via_3d_reg.h #define HC_HTXnTBLAa_Fog        (HC_XTA_Fog << 14)
HC_XTA_Fog       1191 drivers/gpu/drm/via/via_3d_reg.h #define HC_HTXnTBLAb_Fog        (HC_XTA_Fog << 7)
HC_XTA_Fog       1200 drivers/gpu/drm/via/via_3d_reg.h #define HC_HTXnTBLAc_Fog        (HC_XTA_Fog << 0)